The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 1995
Filed:
Apr. 09, 1992
Yuki Kawaguchi, Kanagawa, JP;
Yohji Hirai, Kanagawa, JP;
Satoru Inoue, Kanagawa, JP;
Kazuhiro Kita, Kanagawa, JP;
Fumio Sekiguchi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an apparatus for producing duplicate tapes by transmitting signals reproduced by a master VTR to a plurality of duplicating VTRs for simultaneous recording on respective tapes in the latter; control signals from a bidirectional remote control unit are modulated with a first modulating frequency and are transmitted over a bidirectional control signal line to the duplicating VTRs. If a response is required from one of the duplicating VTRs, response signals from such duplicating VTR are modulated with a second modulating frequency different from the first modulating frequency and, during a pause in signal transmission from the remote control unit, the modulated response signals are transmitted to the remote control unit over the bidirectional control signal line. A test signal is transmitted to the duplicating VTRs in place of the signal reproduced by the master VTR, and defects in the recording operation of the duplicating VTRs are detected from playback of the test signal recorded by the respective duplicating VTRs.